Effect of Welding Heat Cycle Peak Temperature and Heat Input on HAZ Grain Size of SMA490BW Corrosion Resistance Steel

2012 ◽  
Vol 602-604 ◽  
pp. 415-420 ◽  
Author(s):  
Ming Yue Zhang ◽  
Yuan Nie ◽  
Qing Ying Wang ◽  
Hui Chen
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Heat Affected Zone ◽  
Thermal Cycle ◽  
Great Influence ◽  
Peak Temperature ◽  
Line Energy ◽  
Heat Cycle ◽  
Welding Thermal Cycle ◽  
Gleeble 3500

Welding thermal cycle of SMA490BW corrosion resistance steel with different heat inputs were simulated by using Gleeble-3500 thermo-mechanical simulator to investigate the grain size of the heat affected zone (HAZ). Results show that welding heat cycle peak temperature has great influence on the grain size with the same other conditions, the higher peak temperature is the bigger grain size is; in different welding thermal cycling conditions, line energy affects grain size differently; specimens which experienced two thermal cycle have smaller grain size than which experienced just one thermal cycle.

Effect of Heat Input on HAZ Properties and Microstructure of SMA490BW Corrosion Resistance Steel

2011 ◽  
Vol 337 ◽  
pp. 517-521
Author(s):  
Yuan Nie ◽  
Li Jun Wang ◽  
Chuan Ping Ma ◽  
Yong Hui Zhu ◽  
Da Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Impact Energy ◽  
Heat Affected Zone ◽  
Heat Input ◽  
Thermal Cycle ◽  
Coarse Grain ◽  
Welding Thermal Cycle ◽  
Gleeble 3500 ◽  
The Impact ◽  
Small Content

Welding thermal cycle of SMA490BW corrosion resistance steel with different heat inputs were simulated by using Gleeble-3500 thermo-mechanical simulator to investigate the microstructure and impact toughness of the heat-affected zone (HAZ). The results shows that the microstructure of the coarse-grain heat affected zone(CGHAZ) is mainly composed of lath bainites and the surpass critical coarse-grain heat affected zone(SCCGHAZ) consists mainly of granular bainites with a small content of ferrites. The grain size increased with the heat input increasing, Besides, the impact energy of the surpass critical coarse-grain heat affected zone(SCCGHAZ) is higher than that of the coarse-grain heat affected zone(CGHAZ), when the heat input energy is 15kJ/cm after twice thermal cycle, the impact energy is highest.

Effect of Physical Simulation Thermal Parameters on Microstructure Transition and Property Variation of Boron Steel

2011 ◽  
Vol 291-294 ◽  
pp. 919-923
Author(s):  
Kun Han ◽  
Qing Shan Li ◽  
Mei Zhang ◽  
Ren Yu Fu ◽  
Lin Li
Keyword(s):  
Thermal Cycle ◽  
Physical Simulation ◽  
Peak Temperature ◽  
Boron Steel ◽  
Welding Parameters ◽  
Thermal Cycles ◽  
Property Variation ◽  
Microstructure Observation ◽  
Welding Thermal Cycle ◽  
Gleeble 3500

Different physical simulation welding parameters were performed using Gleeble-3500 type thermal simulator to research the effect of thermal cycle on microstructure transition and property variation of boron steel 22MnB5. The peak temperature of welding thermal cycle was set to 1320-870°C, and cooling rates t8/5 to 6s-100s. Then microstructure observation, hardness detection, and impact toughness tests were carried out to clarify the effect of different thermal cycles. The results show that 22MnB5 has good mechanical properties, but the toughness decreases obviously under certain thermal cycles, showing cold crack sensitivity of 22MnB5. Martensite and ferrite are the main microstructure under different peak temperature and t8/5.

Microstructural evolution and mechanical integrity relationship of dissimilar metal welding between 2205 duplex stainless steel and composite bimetallic plates

2021 ◽  
pp. 095440622110036
Author(s):  
Changqing Ye ◽  
Weiguo Zhai ◽  
Guangyao Lu ◽  
Qingsong Liu ◽  
Liang Ni ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Weld Metal ◽  
Duplex Stainless Steel ◽  
Intergranular Corrosion ◽  
Thermal Cycle ◽  
Filler Metal ◽  
2205 Duplex Stainless Steel ◽  
Welding Thermal Cycle ◽  
Intergranular Corrosion Resistance

In this paper, shielded metal arc welding on the dissimilar joint between 2205 duplex stainless steel and composite bimetallic plates (304 L stainless steel/10CrNi3MoV steel) with a filler metal E2209 was performed. Furthermore, the microstructure, phase, mechanical properties and intergranular corrosion resistance of the joints were investigated and element distributions of the interfaces were characterized. The results show that austenite transformed to ferrite under the influence of welding thermal cycle, and then a large amount of ferrite appeared in heat affected zone (HAZ) of 2205 duplex stainless steel. Coarse bainite grains were formed in HAZ of the 10CrNi3MoV steel near the fusion line with high temperature welding thermal cycle. Fine granular bainite was also generated in HAZ of 10CrNi3MoV steel due to the relatively short exposure time to the active temperature of grain growth. Local peak temperature near the base 10CrNi3MoV steel was still high enough to recrystallize the 10CrNi3MoV steel to form partial-recrystallization HAZ due to phase change. The filler metal was compatible with the three kinds of base materials. The thickness of the elemental diffusion interfaces layers was about 100 µm. The maximum microhardness value was obtained in the HAZ of 2205 duplex stainless steel (287 ± 14 HV), and the minimum one appeared in HAZ of SS304L (213 ± 5 HV). The maximum tensile strength of the welded joint was about 670 ± 6 MPa, and the tensile specimens fractured in ductile at matrix of the composite bimetallic plates. The impact energy of the weld metal and HAZ of the 10CrNi3MoV steel tested at –20 °C were 274 ± 6 J and 308 ± 5 J, respectively. Moreover, the intergranular corrosion resistance of the weldment including 304 L stainless steel, weld metal, HAZs and 2205 duplex stainless steel was in good agreement with the functional design requirements of materials corrosion resistance.

Simulation and Experimental Based Analysis of the Laser Beam Welding of DP Steels

2020 ◽  
Vol 1157 ◽  
pp. 73-82
Author(s):  
Raghawendra Pratap Singh Sisodia ◽  
Marcell Gáspár ◽  
Béla Fodor ◽  
László Draskóczi
Keyword(s):  
Laser Beam ◽  
Heat Affected Zone ◽  
Physical Simulation ◽  
Welded Joint ◽  
Laser Beam Welding ◽  
Base Material ◽  
Hardness Tests ◽  
Welding Thermal Cycle ◽  
Diode Laser Beam ◽  
Gleeble 3500

In this paper, heat affected zone characteristics of DP1000 steels was investigated during diode laser beam welding (LBW). A butt-welded joint of specimen in dimension of 300 x 150 mm each (according to EN15614-11:2002) with 1 mm thickness is used for the experimental purpose. The welding thermal cycle and the cooling circumstances in the HAZ was determined by real experiment and the physical simulation. A Gleeble 3500 thermo-physical simulator was used to physically simulate the coarse grain heat affected zone (CGHAZ) on the base material specimens by the utilization of the thermal cycles for t8/5 =2.5 s. The results of the physical simulation were validated by real welding experiments. The properties of the simulated and the real HAZ was examined by optical microscopic, scanning electron microscope and hardness tests.

Microstructure and Properties of Heat-Affected Zones in X100 Steel Grade Line Pipes

2009 ◽  
Author(s):  
Chuanjing Zhuang ◽  
Na Li ◽  
Shipeng Wang ◽  
Weiping Lin ◽  
Jicheng Ren
Keyword(s):  
Heat Affected Zone ◽  
Thermal Cycle ◽  
Deleterious Effect ◽  
Ferrite Matrix ◽  
Steel Grade ◽  
Peak Temperature ◽  
Coarse Grained ◽  
Microstructure And Properties ◽  
The Relationship ◽  
Second Peak

The relationship between microstructure and properties of weld heat-affected zones in X100 grade pipeline steels was studied. It was found that the intercritically reheated coarse-grained heat-affected zone (IRCGHAZ) of experimental steels has the lowest toughness values when the second peak temperature is at the intercritical (α + γ) region during multi-pass welding. The local embrittlement is attributed to the morphology, amount, and size of the M-A constituent. It is also found that the microstructural inheritance at IRCGHAZ has a deleterious effect on toughness. On the basis of the experimental results, it is suggested that the local embrittlement could be prevented by using pre-heating or post-heating thermal cycle. Pre-heating thermal cycle would eliminate the microstructural inheritance and meliorate M-A constituent. Furthermore, the use of a post-heating thermal cycle will improve the morphology, amount and size of the M-A constituent, and improve the conformation of ferrite matrix.

Effect of the welding thermal cycle on the structure, resilience, and corrosion resistance of steel 08Kh8N22S6

1987 ◽  
Vol 23 (2) ◽  
pp. 73-75
Author(s):  
Yu. A. Tsyganov ◽  
V. I. Logvinov ◽  
L. N. Belichenko ◽  
G. A. Zeltova
Keyword(s):  
Corrosion Resistance ◽  
Thermal Cycle ◽  
Welding Thermal Cycle

Effect of Cooling Condition on Microstructure and Mechanical Properties in Large Line Energy Welded Joints of Ultra-Fine Grained Steel

2011 ◽  
Vol 189-193 ◽  
pp. 3345-3350 ◽  
Author(s):  
Hong Yun Zhao ◽  
Li Zhou ◽  
Bo Chen ◽  
Guo Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Cooling Condition ◽  
Water Cooling ◽  
Line Energy ◽  
Fine Grained ◽  
Heavy Plate ◽  
Microstructure And Mechanical Properties

The medium and heavy plate of 800 MPa grade ultra-fine grained steel was welded by CO2 gas shielded welding using large line energy. The effect of cooling condition on microstructure and mechanical properties of welded joints was investigated. The results showed that the cases about significant grain size increasing and strength decreasing do exist in the heat affected zone of large line energy welded joints of 800 MPa grade ultra-fine grained steel. Grain growth and softening in the heat affected zone could be suppressed effectively by water cooling in the course of welding. The mechanical properties of welded joints could be significantly increased by water cooling, and the process of CO2 gas shielded welding under water cooling is practical for joining ultra-fine grained steel using large line energy.

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